Argo Tunnel not working with cloudflare mozilla dns?

So I am trying to configure Mozilla cloudflare DNS ( as my Argo Tunnel proxy DNS upstream, my config.yaml looks like this:

no-autoupdate: false
autoupdate-freq: 24h
proxy-dns: true
proxy-dns-address: [some local address]

The problem is, cloudflared only starts to work a long time after starting my Mac OS system… if I use as the proxy-dns-upstream, this won’t happen – but I prefer Mozilla because it’s more private. How should I fix this? Is there any problem with my config.yaml setup?

Try adding this:
proxy-dns-port: 5053

How is it more private?